G'Day Mark, Which grid tied inverter are you attempting to AC couple with. I apologize if you already called it out in the thread.
Christopher On Fri, Jun 12, 2020 at 2:01 PM Jay <[email protected]> wrote: > Hi Mark, > > Agreed that diversion is the way to go. > As 4v above absorb volts is completely unworkable. > > But I’m not sure that I agree about .5 hz will do anything. The new rule > 21 inverters go off line at 64 hz. And there is a type of tapering based on > hz shift, but it won’t shut off a new gt inverter at+ .5hz. > > Cheers > > Jay > > > > On Jun 12, 2020, at 10:08 AM, Mark Frye <[email protected]> wrote: > > > > Thanks Jay, > > I talked again with Magnum. > > I have the latest Rev 6.1 MS-PAE 4448 so the exact implementation has > changed from that described in AN002, 5/10. The current Rev. has changes > designed to improve interaction with the GT inverters. I didn't really get > to the bottom of that. But the critical aspect of this remains unchanged: > > - the Magnum will have shifted the frequency <down now> by 0.5 Hz > <sufficient to knock the GT inverters off-line> when the DC voltage rises > to Absorb + 4V. > > This makes more sense than the 6V I had in my notes (which may have meant > 6V above Float.) > > With all this in mind, I think I will plan on using this feature as a > backup to an AC dump load controller set to maintain Float voltage. > > > On 6/12/2020 7:12 AM, Jay wrote: > > Hi Mark > > I found this which might be of help. > > > https://www.magnum-dimensions.com/sites/default/files/MagArchive/AN-0002-AC-Coupling-Rev-5-10.pdf > > Jay > Peltz power. > > On Jun 12, 2020, at 6:59 AM, Mark Frye <[email protected]> > <[email protected]> wrote: > > Looking for confirmation from Wrenches who know Magnum inverters: > > - MS-PAE > > -ME-RC > > - Frequency shift enabled (battery type "Custom") > > - AC coupled PV inverters w/o frequency shift capability > > Function: > > At Absorb voltage frequency shift is zero, at Absorb voltage + 6 V, shift > is 0.5 Hz <grid ties pushed off-line> (in 0.3 volt increments) > > This is from my notes from a tech support call, but I am wondering if I > have it mixed up. Protecting at 6 volts above the Absorb seems a bit high. > > Thanks, > > Mark > > > _______________________________________________ > List sponsored by Redwood Alliance > > List Address: [email protected] > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://www.mail-archive.com/[email protected]/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org > > > _______________________________________________ > List sponsored by Redwood Alliance > > List Address: [email protected] > > Change listserver email address & > settings:http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://www.mail-archive.com/[email protected]/maillist.html > > List rules & etiquette:www.re-wrenches.org/etiquette.htm > > Check out or update participant bios:www.members.re-wrenches.org > > _______________________________________________ > List sponsored by Redwood Alliance > > List Address: [email protected] > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://www.mail-archive.com/[email protected]/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org > > _______________________________________________ > List sponsored by Redwood Alliance > > List Address: [email protected] > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://www.mail-archive.com/[email protected]/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org > > -- Chris Schaefer’s <http:www.solarandwindfx.com> *Tel/Fax 585-229-2083 or Cell 585-748-1870 * *5115 South Hill Road ~ Canandaigua New York 14424**www.solarandwindfx.com <http://www.solarandwindfx.com> ~ E-mail: [email protected] <[email protected]>* Thomas Jefferson, the author of our great Constitution, once said, "democracy" will cease to exist when you take away from those who are willing to work and give to those who would not."
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